loveeidge



U e e h s m e e h S 2 H G D I E V O. L, W J m d 0 M 0 m HOT AIR FEEDER 'EOR FURNACES.

Patented June 9, 1885.

u PETERE Phaln-L'nhngnphnr, Wahinglnn, D. c

(No Model) I 2 Sheets-Sheet 2.

J. W. LOVERIDGE.

HOT AIR FEEDER EOE FURNACES. No. 319,828. Patented June 9', 1885.

' inafter specified.

- edge of the brick or masonry wall.

W. LOVERIDGE, OF JERSEY CITY, NEWV JERSEY.

HOT-AIR FEED ER FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 319,828, dated June 9, 1885.

Application filed October 28, 1834. (No model.)

To all whom it may concern.-

Be itknown that I, JAS. W. LOVERIDGE, of

Jersey City, in the county of Hudsonandmy hot-air-feeding pipe as situated on the front upper edge of the bridge-wall; Fig. 2, a planview of the same, the walls of the furnace being broken away; Fig. 3, a vertical longitudinal section of a furnace provided with my hot-air-feeding pipes situated both on top of the bridge-wall and over the door; Fig. 4., a detail plan view showing the manner of using the angle-pipe with the air-feeding pipe on the bridge-wall when the air is to be taken from an opening at the rear of the wall; Fig. 5, a' detail plan view showing the manner of arranging and using the pipe and angle-pipe when the boilers are set in batteries; Fig. 6, a detail vertical sectional view showing the same; Fig. 7, a detail. view of. the air-receiving end of the pipe; Fig. 8, a detail View in end elevation of one of the pipe-sections; Fig. 9, a detail view of oneof the angle-pipes.

Letters of like name and kind refer to like parts in each of the.figures..

The object of my invention is to provide an improvement in the means for feeding hot. air to furnaces; and to this end it consists in the pipes made of the material and constructed, arranged, and operating substantially as here- In the drawings, A designates the bridgewall of a furnace of the ordinary form and construction. The upper and forward edge of the wall is formed of a perforated pipe, B B, set into the wall and preferably projecting somewhat forward beyond its front face.

This pipe, as shown, is preferably made with its upper and lower sides, B and B flat and parallel, and its rear side perpendicular, so

that it can be set firmly and securely into the The front side, B, of the pipe is rounded and provided with a number of small holes, b 1), extending through to the internal bore, 0, of the pipe.

One end of the pipe at one side of the bridge wall is stopped with a plug, D, or other means.

The other end is carried through the side wall V but in a number of sections, each one of which is provided on one end with an annular recess ornrabbet, E, around the pipe-bore, and on the other with an annular lip or projection, F, adapted to fit the annular rabbet or recess in the end of the .next section. A continuous pipe will thus be formed when the sections are put together.

As shown in the drawings, the bore of the pipe is made concentric with the curve of the rounded side of the pipe. Through the rectangular portion of the pipe, on the other side of the bore, I contemplate making several small holes, G G, passing longitudinally through the pipe-sections.

If desired to hold the sections firmly together and brace the pipe, iron rods II H can be passed through these openings. Such rods are, however, not always necessary, and can be dispensed with without departing from my invention.

My pi pe-sections I make of a mixture of graphite and clay, the usual crucible mixture,

the graphite being in exess of the clay.

the angle-pipe I, (shown best in Fig. 9,) and.

connect one of its ends with the end of the next section of pipe by bringing them together so that the annular rib or projection around the bore on the section end fits the rabbet or recess 1 in the end of the angle-pipe. The other end of the angle-pipe is then turned to the rear and communicates with the opening K in the side wall of the furnace in rear of the bridge-wall.

Where the boilers are set in batteries the angle-pipe connecting with the main pipe end section can be turned upward, as shown in Fig. 5, to take air from a passage, L, cut or made down betweenthe adjacent walls L L.. Instead of forming or cutting an air-passage IOO downward, as just described, the angle-piece may be turned downward and the air betaken intoit from below the grate, out of the ash-pit,

or from an air-passage extending up betweenthe adjoining walls of masonry.

Instead of placing the pipe in the upper front edge of the bridge-wall, it can be placed directly on top of the wall with its rounded and perforated side upward, as shown in Fig. 3, or over the door with its rounded and perforated side turned toward therearend of the furnace.

NVhere the draft is weak I contemplate using both a pipe over the door and one on top of the bridge-wall, each pipe being supplied with air forced into it as desired.

The shape of the'pipe I prefer shall be as shown in the drawings, as being the-niost'con- The holes for the brace-rods I make aboutone venient when the pipe is to be placed'on or set into wallsof fire-brickor masonry. I do not, however, intend herein to limit myself to any particular shape or configu-ration of it."

The-size and dimensionswofthepipe and bore thereof which I have found byiactual use to be advantageous are as follows? Fro'mthe rounded side to the rear flat side I niake six inches, while the=distance between thje-flat parallel sides or faces is 'about 'fi've' inches.

half inch in diameter. The diameter of the bore of the pipe is about three' -incheswhile the thickness of the lip, flange, or rib, and the width of the corresponding recess on th'eiends' of the pipe-section is about onehalf an inch all around the bore. These relative 'dimen,

sions are not essential, but canof course be' changed as desired to suit any'particular case. With the bore of the pipe three inches in diameter and the pipe fiveinches-from one parallel side to the other, if,- as described; the bore be made concentric with the rounded side of the pipe, the thickness of the material between the bore and pipe front willbe one inch.; Theperforations bored through the front of-"the jets of air to becomeheated to any considerable extent by contact with the sides'of the openings or perforations. contained within the main-pipebore could not become thoroughly heated, because while mov-'* ing through the pipe only a portion of it could come into direct contact with the sides thereof and'be heated directly therefrom. Theresult,

then, of the use of metal pipes as heretofore has been that the air was not and could not be heated to the desirable degree while passing through the pipe and its perforations in the desired quantity. Metal pipes have, more- The volume of air over, when thus used, been found to burn out rapidly. v

7 It has been attempted heretofore to extend the passages through which the air issues from the feed pipe by using small tubes or nozzles in connection with the perforations in the pipe; but these have been found to burn off very quickly and become useless. The material which I use-the ordinary crucible mixtureasis well known, cannot be burned out and destroyed like metal pipes.

I hzwe found also, by actual experimcnt, that this material is better than any heretofore used for hot-air-feeding pipes, because such material has the property of parting with its heat most rapidly, so that where the airfeeding pipe is made of it and used as described the heat of the fire of the furnace and *of' the gases arising therefrom is transmitted most quickly andfully to the air within and "passing through the pipe. If the air were allowed simply to flowt-hrough a pipe made of this material exposed to theheat of the furnace, it would be heated very rapidly and to a high degree; but where, as in my pipe, the air within the pipe is allowed to flow out in fine jets through small passages of considerable length through the thick wall of the pipe,

so that every portion of the air-fed is brought into direct contact with a considerable amount "of'heat-imparting "surface, the result is. that the air as delivered is heated so highly as to instantly form a combination with the hot gases arising fromthe coal in excess. Such gases are then completely consumed, and a smokeless fire, with great saving of fuel, is secured; L "To feed or force the air into the open end of the pipe I contemplate using any air-forcing device or mechanism, but prefer a steam-jet to inject the air; I have not shown or described any'form thereof herein, but intend'to show and describe it in an application for patent for the jet, to be filed shortly by me.

. The advantageous action of the pipe made of crucible mixture, as described, is due to the presence of the'graphite, which possesses to a great degree the quality of parting most rapidly'andfreely with any heat imparted to it. Instead ofthe clay mixed with the graphite I- contemplate using any other suitable cohering or binding material to bind and hold the particles of graphite together so as to form therewith a solid cohering mass.

Instead of clay I contemplate mixing with the graphite to form material for my pipes asbestus, cement, fire-clay, plaster-of-paris, and

sand. Any one of these can be used with the graphite, or two or more, or all of them can be 'combined and mingled with it, as desired; In such mixtures, however, it is designed thatthe graphite shall form a large, preferably the largest, portion. l

I am aware that a furnace has been provided with a fire-proof lining of 'p'lumbago, and that crucibles have been made of materials containing or in part composed of graphite or p lumbago. Iain also aware that perforated air-feeding pipes have been arranged on the top and on the forward edge of the top of the bridgewall of a furnace as well as over the door. I 5 do not therefore claim, broadly, such pipes so arranged.

Having thus described my invention, What I claim is 1. An air heating and feeding pipe for fur- IO naces, made of material containing graphite and provided with a series of perforations through its wall to allow the escape of the air from within the pipe into the furnace, substantially as and for the purpose described. I5 2. An air heating and feeding pipe for furnaces, made of graphite and clay, and provided with a series of perforations through its wall 2 5 adapted to receive air from the outside of the furnace, substantially as shown and described.

4. The air heating and feeding apparatus for furnaces, consisting of the perforated pipe made of clay and graphite placed uponthe 0 bridge-wall and adapted to receive air from outside the furnace,-substantia1ly as and for the purpose described.

5. The perforated pipe for air heaters and feeders for furnaces, composed of clay and graphite made in sections, each formed on 3 5 one end with an annular lip around its bore and on the other with a corresponding annular recess, so that when the sections are put together one continuous pipe will be formed, substantially as and for the purpose described.

. 6. The pipe for air heaters and feeders for furnaces, composed of graphite and clay and made in sections, each one of which is provided on one end with an annular lip and on the other wit-h a corresponding recess, so that 5 when the sections are put together one continuous pipe will be formed, and with longitudinal openings or passages outside of the main boxes of the sections through which metal rods can be passed throughout the length of 50 the pipe to strengthen the pipe'or hold the sections together, substantially as and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand this 11th day of 55 October, A. D. 1881.

J. W. LOVERIDGE.

Witnesses:

SYLvEsTER J UDD, Josnrn T. SANGER. 

